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Class K9 K8 K7 Galvanize 200mm 300mm 350mm 400mm Ductile Iron Pipe ISO2531 C25 C30 C40 K9 Di Pipe Cement Coating Ductile Iron Pipe Price, Find Details and Price about Ductile Iron Pipe and Ductile Iron Pipe Price from Shandong Jia Jie Na Metal Product Co., Ltd.